Series Resonance: What size capacitor should be placed in series with a 30-? resistor and a 40-mH inductive coil if the resonant frequency of the circuit is to be 1.0 kHz?
A. 2.0 µF
B. 0.63 µF
C. 3.3 µF
D. 6.0 µF
E. 4.5 µF
Answer: B
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Exhibit 5-1
A 2.30-kg mass is suspended from the ceiling and a 1.70-kg mass is suspended from the 2.30-kg mass, as shown. The tensions in the strings are labeled 
and 
.
?
?
Use this exhibit to answer the following question(s).
Refer to . The string supporting the 1.70-kg mass is cut. The magnitudes of the tension in string 1 before and after string 2 is cut are
A.
= 22.5 N; 
= 5.80 N. B.
= 39.2 N; = 5.80 N.C.
= 22.5 N; = 22.5 N.D.
= 39.2 N; = 22.5 N.E.
= 39.2 N; = 39.2 N.Why can we never create energy?
A) because it is impossible to create the fundamental particles such as electrons and protons B) because energy is always conserved C) because of the equivalence of mass and energy D) because matter is always conserved E) Actually, we do create energy frequently in the lab.
How much work is required to move a charge from one location on an equipotential to another point on the same equipotential? Explain
What will be an ideal response?
A 1.37-kg block is held in place against the spring by a 74-N horizontal external force (see the figure)
The external force is removed, and the block is projected with a velocity v1 = 1.2 m/s upon separation from the spring. The block descends a ramp and has a velocity at the bottom. The track is frictionless between points A and B. The block enters a rough section at B, extending to E. The coefficient of kinetic friction over this section is 0.24. The velocity of the block is at C. The block moves on to D, where it stops. The initial compression of the spring is closest to A) 2.7 cm. B) 1.4 cm. C) 0.96 cm. D) 5.3 cm. E) 3.6 cm.